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以地铁车站、区间隧道和地铁车厢内的典型污染物CO_2为研究对象,采用理论分析、模拟计算和现场测试等方法,对闭式地铁系统内部的空气品质进行了研究。基于污染物浓度的基本模型,分析了地铁内部的通风情况,建立了地铁内部CO_2浓度的计算模型。选取一条闭式运行的地铁线路,对其内部CO_2浓度进行了模拟计算,并将模拟结果与实测结果进行了对比分析。结果表明,模拟结果与实测结果基本一致。该方法可用于分析设计阶段闭式地铁系统内部的CO_2浓度变化情况,从而指导闭式地铁环控系统的设计。
Taking the typical pollutants CO_2 in metro stations, tunnels and subway cars as research objects, the air quality in closed subway system was studied by means of theoretical analysis, simulation calculation and field test. Based on the basic model of pollutant concentration, the ventilation inside the subway is analyzed, and the calculation model of CO 2 concentration inside the subway is established. A closed subway line is selected to simulate the CO 2 concentration in the interior. The simulation results and the measured results are compared and analyzed. The results show that the simulation results and the measured results are basically the same. This method can be used to analyze the variation of CO 2 concentration in closed metro system in the design stage and guide the design of closed loop metro system.